I am upgrading from Mountain Lion to Sierra; and from Pv8 to Pv12 - which to do first? (mid-2011 iMac). If I upgrade the OS from Mountain Lion to Sierra first, will Parallels 8 work well enough for me to upgrade to Parallels 12? Or is it better for me to upgrade from Parallels 8 to Parallels 12 first? Does Parallels 12 even work on Mountain Lion? (I'm of the impression that it does not.) I trying to figure out the cross compatibility to determine which I should do first, and I'm frankly just not sure.
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